The human arm-bone is also known as the humerus bone. It is the long bone that extends from the shoulder joint to the elbow joint and plays a crucial role in the movement of the arm. There are several synonyms that can be used to describe the arm-bone, including the upper-arm bone, brachium, or simply the humerus. The term "brachial bone" is also sometimes used to refer to the arm-bone. While these terms are not entirely interchangeable, they each provide useful alternatives to the common term "arm-bone." Understanding these synonyms can enhance your anatomical knowledge and provide clarity when discussing issues related to the arm-bone.